Having Issue while reading a excel file with .xls extension about npoi HOT 4 CLOSED

// Iterate through rows and cells to read data from Excel file
for (int i = 0; i <= sheet.LastRowNum; i++)
{
IRow row = sheet.GetRow(i);
if (row != null)
{
     // Check if all cells in the row are empty or blank using TrueForAll
     if (Enumerable.Range(0, row.Cells.Count).All(index => row.Cells[index].CellType == CellType.Blank))
     {
          continue; // Skip the row if all cells are empty
     }
    
     for (int i = 0; i < row.Cells.Count; i++) // possibly you should use fixed columns number
     {
          var currentCell = row.GetCell(i);

           if (currentCell == null || currentCell.CellType == CellType.Blank)
                throw new InvalidDataException(INVALID_DATA_UPLOADED);
      }
     lines.Add(row.Cells.Select(cell => cell.ToString()).ToArray());
}
}